US4330049A - Disc brake assembly and resilient member therefor - Google Patents

Disc brake assembly and resilient member therefor Download PDF

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Publication number
US4330049A
US4330049A US06/116,126 US11612680A US4330049A US 4330049 A US4330049 A US 4330049A US 11612680 A US11612680 A US 11612680A US 4330049 A US4330049 A US 4330049A
Authority
US
United States
Prior art keywords
pair
caliper
assembly
friction elements
friction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/116,126
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English (en)
Inventor
Mark J. Cybulski
Bert A. Gumkowski
Larry A. Portolese
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Technology Corp
Original Assignee
Bendix Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Priority to US06/116,126 priority Critical patent/US4330049A/en
Priority to CA000364816A priority patent/CA1176581A/en
Priority to AU66258/81A priority patent/AU532990B2/en
Priority to DE8181400093T priority patent/DE3164632D1/de
Priority to EP81400093A priority patent/EP0033276B1/en
Priority to BR8100422A priority patent/BR8100422A/pt
Priority to JP1032481A priority patent/JPS56120829A/ja
Application granted granted Critical
Publication of US4330049A publication Critical patent/US4330049A/en
Assigned to ALLIEDSIGNAL TECHNOLOGIES INC. reassignment ALLIEDSIGNAL TECHNOLOGIES INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIEDSIGNAL INC.
Assigned to ALLIED CORPORATION reassignment ALLIED CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). Assignors: BENDIX CORPORATION, THE
Assigned to ALLIED-SIGNAL INC. reassignment ALLIED-SIGNAL INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: ALLIED CORPORATION
Assigned to ROBERT BOSCH TECHNOLOGY CORPORATION reassignment ROBERT BOSCH TECHNOLOGY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIEDSIGNAL TECHOLOGIES INC.
Assigned to ALLIEDSIGNAL INC. reassignment ALLIEDSIGNAL INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ALLIED-SIGNAL INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
    • F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
    • F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
    • F16D65/0975—Springs made from wire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins

Definitions

  • the present invention relates to disc brake assemblies wherein a pair of friction elements are movable by a caliper assembly during a brake application.
  • a support member defines a pair of circumferentially spaced arms which are engageable with the pair of friction elements to absorb braking torque.
  • U.S. Pat. Nos. 3,625,314, 4,068,744 and 4,119,180 show such brake assemblies.
  • a rotatable member such as a disc
  • a force is imparted to the caliper assembly by the action of fluid pressure within a pressure chamber on the caliper assembly to bias the latter to move transverse to the disc, thereby bringing the pair of friction elements into engagement with the disc.
  • the combination of the caliper housing forces and the moment for the pair of friction elements creates a force on the caliper housing biasing the latter to move radially outwardly away from the disc.
  • This combination results from the cooperation of forces generated by a piston within the caliper and by the pair of friction elements during braking.
  • the portion of the caliper assembly opposite the pressure chamber tends to tilt radially outwardly away from the disc.
  • the outer friction element opposite the pressure chamber is also tilted slightly so that it wears unevenly. Consequently, the life of the outer friction element is shortened, to say nothing of the loss in braking efficiency. Moreover, the tilting caliper also causes the inner friction element adjacent the pressure chamber to wear unevenly, albeit to a lesser degree. In the worst case, the tilting caliper might interfere with a rim of a wheel assembly, thereby damaging the rim during a brake application.
  • the present invention provides a simple solution to the aforegoing problem with a resilient member defining an interlocking fit connecting the caliper assembly to the support member to substantially prevent the caliper application from tilting during a brake assembly.
  • the resilient member is releasably coupled to the caliper assembly and engageable with the pair of friction elements to retain the latter connected with the caliper assembly before the caliper assembly is assembled with the support assembly.
  • At least one of the pair of friction elements defines a first interlocking fit with the spaced arm of the support member.
  • the first interlocking fit permits the one friction element to move transversely relative to the disc but prevents radial movement relative to the disc.
  • the resilient member defines a second interlocking fit between the caliper assembly and the one friction element to substantially prevent the caliper assembly from moving radially outwardly relative to the one friction element and the spaced arm of the support member.
  • a pair of resilient members cooperates with the caliper assembly to connect the pair of friction elements thereto.
  • Each resilient member defines interlocking connections between the caliper assembly and the pair of friction elements and at least one of the pair of friction elements defines interlocking connections with at least one of the the pair of circumferentially spaced arms of the support member.
  • Each resilient member extends substantially axially within a clearance between the caliper assembly and each spaced arm.
  • a bent portion on each axially extending resilient member is engageable with the caliper assembly to preload each resilient member.
  • the resilient members bias the pair of friction elements radially outwardly to engage with the caliper assembly or the spaced arms to eliminate rattle or noise generated by the pair of friction elements.
  • At least one resilient member couples a pair of friction elements to a caliper assembly while also cooperating with the friction elements and caliper assembly to define an interlocking fit preventing radially outward movement of the caliper assembly relative to the friction elements.
  • FIG. 1 is a front cross-sectional view of a disc brake assembly
  • FIG. 2 is a top view of FIG. 1 showing the present invention
  • FIG. 3 is a side view of FIG. 2.
  • a disc brake assembly 10 shown on FIG. 1 includes a disc or rotor 12 rotatable with a wheel assembly 14 to be braked.
  • a support member 16 movably mounts a caliper assembly 18 having an outer leg 20 on one side of the rotor 12 and an inner leg 22 on the other side of the rotor 12.
  • the leg 22 defines a cylinder 24 receiving a piston 26 so that fluid pressure within the cylinder 24 causes the piston 26 to move toward the rotor 12 while the remaining parts of the caliper assembly move in the opposite direction. Consequently, a pair of friction elements 28 and 30 are moved into frictional engagement with the rotor during a brake application.
  • the support member includes threaded openings 32 and 34 which secure pin assemblies 36 and 38 and the caliper leg 22 is apertured at 40 and 42 for the purpose of movably mounting the caliper assembly on the pin assemblies 36 and 38.
  • the support member includes axially extending arms 44 and 46 which are circumferentially spaced on opposite sides of the caliper assembly. Each arm defines surfaces 48 and 50 which are engageable with each friction element to absorb braking torque during braking. If the forward rotation of the rotor is from right to left in FIG. 2, then the arm 46 is a leading arm and the arm 44 is a trailing arm. Regardless the direction of rotation for the rotor, the torque developed during braking will be transferred to the support arms so that the caliper assembly absorbs only a slight amount of torque.
  • FIG. 3 it is seen in FIG. 3 that the leading arm surface 50 is provided with a recess 52 opening toward the friction element 30.
  • the pair of friction elements 28 and 30 terminate in matching surfaces so that FIG. 3 shows a projection 54 on friction element 30 which extends into the recess 52. Consequently, the pair of friction elements cooperates with the arm 46 to define an interlocking fit substantially preventing radial movement of the pair of friction elements relative to the arm 46.
  • a resilient member 60 shown more clearly in the cutaway portion of FIG. 2 is releasably connected to the caliper assembly via caliper projections 62 and 64 disposed on opposite sides of the rotor 12.
  • the resilient member 60 extends axially between the projections except for a bent portion 66 which is engageable with the underside of the caliper to impart a preload to the resilient member.
  • Each friction element is provided with a cutout 68 opening toward the caliper assembly and the resilient member 60 is disposed within the cutout 68 closest to the arm 46. Therefore, the resilient member 60 biases the friction elements upward viewing FIG. 3 to engage the friction elements with either a side edge 70 on the caliper assembly 18 or with the top wall of recess 52.
  • the friction element 30 is disposed adjacent the projection 62 and the resilient member 60 engages a top surface 72 of the projection 62 and also a top wall 74 of cutout 68 to define another interlocking fit. The other interlocking fit substantially prevents radial outward movement of the caliper leg 20 relative to the friction element 30.
  • another resilient member 80 cooperates with the trailing end of the pair of friction elements to releasably connect the friction elements to the caliper assembly.
  • the trailing end of the pair of friction elements does not form an interlocking fit with the trailing arm 44.
  • the projection 54 of the leading end is inserted into the recess 52, the pair of friction elements while connected to the caliper assembly are rotated counter-clockwise viewing FIG. 3 until the trailing end of the friction elements is engaging the trailing arm 44, and the pin assemblies 36 and 38 are inserted through apertures 40 and 42 to fasten with openings 32 and 34.
  • the resilient members 60 and 80 are disposed within respective clearances 82 and 84 between side edges of the caliper assembly and the circumferentially spaced arms.
  • a vehicle incorporating the disc brake assembly 10 is traveling in a forward direction.
  • fluid pressure is communicated to the cylinder 24.
  • the piston 26 is moved toward the rotor to bias the inner friction element 28 into engagement with the rotor.
  • a reaction force created by the friction element 28 engaging the rotor biases the caliper assembly 18 to move on the pin assemblies in a direction opposite to the movement of the piston 26 so that the outer friction element 30 is also brought into engagement with the rotor.
  • the leg 20 biases the outer friction element into engagement with the rotor.
  • the rotating rotor 12 engages the leading ends of the friction elements 28 and 30 to bias the same to move upward viewing FIG. 3 away from the arm 46.
  • the reaction forces on the caliper assembly generate a lifting force for the caliper leg 20 tending to move the leg 20 upward viewing FIG. 3.
  • This lifting force is primarily located on that portion of the leg adjacent the leading end of the pair of friction elements.
  • the projection 62 forces the resilient member 60 into abutment with the wall 74 of friction element 30. Since the friction element is substantially locked to the arm 46, the wall 74 will be prevented from moving upward. Consequently, the resilient member will be substantially stationary to oppose lifting of the leg 20.
  • each axial end of the resilient member 60 is U-shaped so that the resilient member can be carried by the projections 62 and 64 of the caliper assembly 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
US06/116,126 1980-01-28 1980-01-28 Disc brake assembly and resilient member therefor Expired - Lifetime US4330049A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US06/116,126 US4330049A (en) 1980-01-28 1980-01-28 Disc brake assembly and resilient member therefor
CA000364816A CA1176581A (en) 1980-01-28 1980-11-17 Disc brake assembly and resilient member therefor
AU66258/81A AU532990B2 (en) 1980-01-28 1981-01-16 Disc brake assembly
DE8181400093T DE3164632D1 (en) 1980-01-28 1981-01-23 Disc brake assembly
EP81400093A EP0033276B1 (en) 1980-01-28 1981-01-23 Disc brake assembly
BR8100422A BR8100422A (pt) 1980-01-28 1981-01-27 Conjunto de freios a disco e peca flexivel para o mesmo
JP1032481A JPS56120829A (en) 1980-01-28 1981-01-28 Disc brake assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/116,126 US4330049A (en) 1980-01-28 1980-01-28 Disc brake assembly and resilient member therefor

Publications (1)

Publication Number Publication Date
US4330049A true US4330049A (en) 1982-05-18

Family

ID=22365409

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/116,126 Expired - Lifetime US4330049A (en) 1980-01-28 1980-01-28 Disc brake assembly and resilient member therefor

Country Status (7)

Country Link
US (1) US4330049A (en])
EP (1) EP0033276B1 (en])
JP (1) JPS56120829A (en])
AU (1) AU532990B2 (en])
BR (1) BR8100422A (en])
CA (1) CA1176581A (en])
DE (1) DE3164632D1 (en])

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410068A (en) * 1981-08-13 1983-10-18 The Bendix Corporation Disc brake and anti-rattle spring therefor
US4410069A (en) * 1981-06-29 1983-10-18 The Bendix Corporation Disc brake
US4467897A (en) * 1981-12-18 1984-08-28 Tokico Ltd. Disc brake with first and second springs for preventing the vibration of friction pad
US4552253A (en) * 1982-06-24 1985-11-12 Itt Industries, Inc. Floating-caliper disc brake
US4553645A (en) * 1983-02-02 1985-11-19 Allied Corporation Disc brake
GB2190442A (en) * 1986-05-16 1987-11-18 Teves Gmbh Alfred Spot type disc brake
US20080093181A1 (en) * 2006-10-19 2008-04-24 Waag James R Brake caliper guide pin assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436186A (en) * 1981-10-02 1984-03-13 The Bendix Corporation Disc brake assembly
GB2202287B (en) * 1987-03-20 1991-03-20 Automotive Products Plc Disc brakes
JPS6469870A (en) * 1987-09-07 1989-03-15 Toyo Valve Co Ltd Valve and its manufacture

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2049035A1 (de) 1969-10-08 1971-04-22 Bendix Corp Scheibenbremse
US3625314A (en) * 1969-06-26 1971-12-07 Kelsey Hayes Co Sliding caliper-type disk brake
US3865215A (en) * 1973-08-09 1975-02-11 Itt Spot-type disc brake
FR2252035A5 (en]) 1973-11-16 1975-06-13 Ferodo Sa
US3958668A (en) * 1974-12-23 1976-05-25 The Bendix Corporation Closed loop type disc brake
DE2713360A1 (de) 1976-03-26 1977-09-29 Girling Ltd Schwimmsattel-scheibenbremse
US4068744A (en) * 1976-08-30 1978-01-17 The Bendix Corporation Floatation and anchoring mechanism for disc brake
US4119180A (en) * 1976-08-27 1978-10-10 Toyota Jidosha Kogyo Kabushiki Kaisha Disc brake friction pad guide and support structure
US4194597A (en) * 1978-08-01 1980-03-25 Kelsey Hayes Co. Disc brake anti-rattle means
DE2711729C3 (de) 1976-03-19 1980-07-03 Sumitomo Electric Industries, Ltd., Osaka (Japan) Federeinrichtung zur Schwingungs- und Geräuschdämpfung einer Schwimmsattel-Teilbelag-Scheibenbremse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50106071A (en]) * 1974-01-28 1975-08-21
JPS59514Y2 (ja) * 1977-11-15 1984-01-09 日信工業株式会社 デイスクブレ−キ装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625314A (en) * 1969-06-26 1971-12-07 Kelsey Hayes Co Sliding caliper-type disk brake
DE2049035A1 (de) 1969-10-08 1971-04-22 Bendix Corp Scheibenbremse
US3865215A (en) * 1973-08-09 1975-02-11 Itt Spot-type disc brake
FR2252035A5 (en]) 1973-11-16 1975-06-13 Ferodo Sa
US3958668A (en) * 1974-12-23 1976-05-25 The Bendix Corporation Closed loop type disc brake
DE2711729C3 (de) 1976-03-19 1980-07-03 Sumitomo Electric Industries, Ltd., Osaka (Japan) Federeinrichtung zur Schwingungs- und Geräuschdämpfung einer Schwimmsattel-Teilbelag-Scheibenbremse
DE2713360A1 (de) 1976-03-26 1977-09-29 Girling Ltd Schwimmsattel-scheibenbremse
US4119180A (en) * 1976-08-27 1978-10-10 Toyota Jidosha Kogyo Kabushiki Kaisha Disc brake friction pad guide and support structure
US4068744A (en) * 1976-08-30 1978-01-17 The Bendix Corporation Floatation and anchoring mechanism for disc brake
US4194597A (en) * 1978-08-01 1980-03-25 Kelsey Hayes Co. Disc brake anti-rattle means

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410069A (en) * 1981-06-29 1983-10-18 The Bendix Corporation Disc brake
US4410068A (en) * 1981-08-13 1983-10-18 The Bendix Corporation Disc brake and anti-rattle spring therefor
US4467897A (en) * 1981-12-18 1984-08-28 Tokico Ltd. Disc brake with first and second springs for preventing the vibration of friction pad
US4552253A (en) * 1982-06-24 1985-11-12 Itt Industries, Inc. Floating-caliper disc brake
US4553645A (en) * 1983-02-02 1985-11-19 Allied Corporation Disc brake
GB2190442A (en) * 1986-05-16 1987-11-18 Teves Gmbh Alfred Spot type disc brake
GB2190442B (en) * 1986-05-16 1989-12-06 Teves Gmbh Alfred Spot-type disc brake
US5052526A (en) * 1986-05-16 1991-10-01 Alfred Teves Gmbh Spot-type disc brake
US20080093181A1 (en) * 2006-10-19 2008-04-24 Waag James R Brake caliper guide pin assembly

Also Published As

Publication number Publication date
CA1176581A (en) 1984-10-23
JPH0228736B2 (en]) 1990-06-26
EP0033276A1 (en) 1981-08-05
AU532990B2 (en) 1983-10-20
BR8100422A (pt) 1981-08-11
AU6625881A (en) 1981-08-06
DE3164632D1 (en) 1984-08-16
JPS56120829A (en) 1981-09-22
EP0033276B1 (en) 1984-07-11

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